The TS-100 Air-Powered Speaker Stand from Ultimate Support lifts up to 50 pounds without your help. Its spring is under a 50-pound preload-when the speaker is safely loaded on the stand, turn the telescoping knob and raise any speaker weighing under 50 pounds with zero effort on your part. If your speaker weighs more, you'll be impressed by how little effort it takes to raise the speaker to the right height.